Strainer screen and method op making same



P. MUELLER STRAINER SCREEN AND METHOD- 0F MAKING SAME Filed OCT.. 24,1925 alici mugs.'

Patented Oct. 23, 19218.

UNEF@ PHILIP MUELLER, F DECATUR, ILLINOIS, ASSIGNOR TO ADOLIH MUELLER,TRUSTEE, OF DECATUR, ILLINOIS.

STRAINER SCREEN AND METHOD OF MAKING SAME.

Application filed October 24, 1925.

The present invention relates to strainer screens such as are used instrainers ot' lt-he type disclosed in my Patent No. 1,370,147, datedMar. 1, 1921, and it has for its object to provide a screen blank, ascreen, and a method of making the same by which screens can be producedat reasonable cost, both with respect to mechanical operation and stock,with a resulting etlicient and dependable screen structure, thereplacement of which may be effected at small cost.

In' order that the development may be clear to those skilled in the art,I have shown in the accompanying drawings one physical embodiment ot myinvention, but this is merely illustrative of the invention and notrestrictive. j

In said drawings:

Fig. 1 is a view of a blank from which the screen is made.

Fig, 2 is an edge view to show one step in the method of forming thescreen.

Fig. 3 is a similar view showing the screen in process of formation.

Fig. el illustrates another step of the method.

Fig. 5 is a view in vertical section of the completed screen.

Referring to the. drawings by numbers, like numbers indicating likeparts in the several views, Fig. 1 shows the blank 1() from which thescreen is formed. The blank is cut as shown from any suitable screenstock of appropriate mesh, and is preferably formed in substantially theshape of a sector of a band with curved lower and upper edges, andstraight ends, although it may take other shapes. The upper edge of thissector is cut as shown, so as to give a series of leaves or foliations11, the tips ot which are rounded as at 12. The ends 13 and 14 of theblank will project beyond the line of the leaves 11, one of these ends14 projecting to a greater extent than the other, so as to provide stockfor forming the interlocked seam of the completed strainer, all asswillappear hereinafter.

The blank thus formed will be bent as shown in Fig. 3, where the methodof bending the blank in its initialstep is indicated. As there shown,the leaves 11 will be intolded .so as to lap, one over theJ other, sothat, when Serial No. 64,695.

brought to final position, they will overlie each other and close thetop of the screen. Owing to the fact that the blank 10 in the preferredtorni, is cut as a sector ot a band, it will take, in its completedform, a conical` shape, the top ot which, as stated, is closed by theintolded, overlapped leat section 11.

The end 18 of the blank 10, as shown in Figs. 2 and 3, will be bent upsubstantially at right angles to the body of the blank, while theextended end 14 will be bent upwardly at substantially right angles, andthen its ei;- treme end bent downwardly so as to torirL an interlockingseam 15 to receive the end 14- of the blank. lVhen the screen is broughtto its final form for side seaming, the end 13 will be bent downwardlyand hooked into engagement with the seam 15 ot' the extended end 1d, asshown in Fig'. 1, and in this form placed upon a mandrel 16 having agroove 17 to receive the interlocked ends 18 and 1st of the screen. Inthis position of the screen upon the mandrel, the interloeked seam willbe subjected to the pressure of an appropriate tool 18 of proper contourto compress and set the seam, and owing to the fact that the groove 17of the mandrel receives the seam, the compression ot' the tool 18 willtorce the seam interiorly ot' the screen and leave the screen with itsouter surface in a smooth unbroken circumference so as to avoid anycrevices in which matter suspended in the water flowing through thescreen can lodge and collect, and ensure an unbroken, continuous seatingcontact of the screen in its seat, as shown in Fig. 5.

rIhe screen thus formed is entirely closed, both at its side and at itstop where the leaves 11 are `t'olded one over the other, and thesefolded and overlappedv leaves may be subjected to compression, ifdesired, so as to set them in their linal interleaved condition.

The screen in this condition will then he mounted upon its supportingrod, as shown in Fig. 5. riChe supporting rod 19 will be passed throughthe overlapped leaves 11, but, prior to thrusting the end of the rod 19through the leaves. there will be threaded upon it a disk or washer 2Owhich will beheld in place in any suitable manner, but, preferably ashere shown, by compressing the rod 1S) just below the Washer so as tothrow out a holding protuberance or burr 9,1 which will hold the washer2l) in proper position. The end of the rod 19 which is thrust throughthe top ot the screen will extend suficiently beyond the screen topermit a second washer 2Q to be threaded thereon, and then the extremeend oi the rod will be upset as shown, to provide a protuberance or burr23, which will lock the Washer Q2 in place, and the screen will be heldsecurely between the Washers.

In event of the screen becoming corroded and worn, it may be veryreadily and quickly replaced by simply removing the washer 22, placing ascreen upon the end of the rod, replacing the Washer, and upsetting theend of the rod. As a matter of fact, the cost of rod 19 and Washers 2Oand 22 is so small that itis contemplated., vvh en replacements arenecessary, in strainers for which the screen 4is designed, to replace acorroded or damaged screen by a complete screen and supporting rod.

Screens made in accordance with my method and l'folloiving theconstruction illustrated and described may be very rapidly and cheaplyconstructed by unskilled labor, and With a minimum of mechanicaldevices, it being necessary only to have equipment which will blank outof suitable stock the screen blank, provide t-he necessary seaming toolstor forming the ends, and the mandrel and stamp ttor closing theinterlocked screen.

Such minor changes in construction as are 'Within the skill of themechanic may be made and still be Within the range of my invention.

I claim:

1. A st 'ainer having a body-portion of reticulated material, and a leafintegral with said body-portion bent over and closing an end ot saidbody-portion.

2. A strainer having a body-portion of reticulated material, and leavesintegral With said body-portion bent over in lapped relation and closingan end ot said body-portion.

3. A strainer having a bodysportion ot reticulated material formed atits ends to torm a continuous side Wall, and leaves integral with saidbody-portion bent over in lapped relation and closing an end of saidbody-portion.

Ll. A. strainer having a body-portion ot reticulated materiallock-seained at its end to form a continuous side Wall, and leavesintegral with said body-portion bent over in lapped relation andclosin gan end ol said body portion.

5. A strainer having a body-portion of reticulated material lock-seamedat its ends to form a continuous side Wall, leaves integral with saidbody-portion bent over in lapped relation and closing an end ot saidbocly-portion, and fastening means for said leaves.

6. A strainer having a body-portion of reticulated material lock-seamedat its ends to form a continuous side wall, leaves integral with saidbody-portion bent over in lapped relation and closing an end ot saidbod7n portion, and fastening means passing through said lapped leaves.

7. A strainer having a body-portion ot' reticulated material lock-seemedat its ends to form a continuous side Wall, leaves integral with saidbody-portion bent over in lapped relation and closing an end ot' saidbodyportion, and a strainer supporting rod ther upper end olE whichengages and astens said lapped leaves.

8. A strainer having a bodysportion of reticulatcd material lock-seamedat its ends to form a continuous side Wall, leaves integral with saidbody-portion bent over in lapped relation and closing an end of saidbody-'portion, and a. strainer supporting rod the upper end of whichpasses through and tastens said lapped leaves.

9. A strainer formed of a single piece ot' reticulated material vvith aside seam joining its ends disposed interiorly of the strainer to givean unbroken exterior Wall and infolded overlapped leaves closing oneend.

10. A strainer blank of reticulated material having a plurality ofintegra-l leaves projecting from its edge.

11. A strainer blank of reticulated material having a plurality ot'integral leaves with rounded ends projecting from its edge.

12. A strainer blank of reticulated 1naterial having a plurality ofintegral leaves at an edge and seam forming sections at its ends. i

-13. A strainer blank of retic-ulated material having a plurality ofintegral leaves at an edge and seam forming sections of unequal lengthsat its ends.

1a. A sector-shaped strainer blank of reticulated material having aplurality of integral leaves projecting from one edge.

15. A sector-shaped strainer blank of reticulated material having aplurality of integral leaves projecting' from its concave edge.

16. The method ot making strainers, which consists in forming a blankwith integral lea-ves at one edge, bending the blank to shape, securingthe ends of the blank together, and infolding said integral leaves inoverlapped relation.

17. The method of makingT strainers` which consists in ,torining a blankwith integral leaves at one edge, bending the blank to shape,lock-seaming the meeting ends of the blank together, intolding saidintegral leaves in overlapped relation, and fastening such overlappedleaves together.

18. The method of making strainers, which consists in forming a blankwith integral leaves at o ne edge, bending the blank to shape,lock-seaming the meeting ends of the blank together With the Aseam lyingWithin the strainer, infolding said integral leaves Within the strainer,nfolding said integral in overlapped relation, and fastening such leavesin overlapped relation, and securing 10 overlapped leaves together.suc-h overlapped leaves together by a strainer 19. The method of makingstrainers, which supporting rod passed therethrough.

consists in forming a sector-shaped blank In testimony whereof I havehereunto set with integral leaves at one edge and end pormy hand.

tions of unequal lengths, look-seaming the end portions together withthe seam Wholly PHILIP MUELLEB.

